Boring-machine for brush-backs.



W. G. LIEBIG.

BORING MACHINE FOR BRUSH BACKS.

APPLIGATION FILED 1 212.9, 1912.

5 Patented Jan.19, 1915.

4 SHEETS-SHEET l.

l N VE/V TOR Arrok/vfy W. G. LIEBIG.

BORING MACHINE FOR BRUSH BACKS.

APPLICATION FILED FEB. 9, 1912.

1,125,351,, Patented Jan. 19, 1915.

. 4 SHEETS-SHEET 2 WITNESSES: l/VI/E/V TOR flhlzaa fidfiw a W12 BY ATTOR/VEY 7H1: NORRIS PETERS c0 PHPTuLIrHo .bXjHANhli-m W. G. LIEBIG.BORING MACHINE FOR BRUSH BACKSx APPLICATION FILED FEB. 9, 1912.

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Patented Jan. 19, 1915.

4 SHEETS-SHEET}.

A UOR/VEY W. G. LIEBIG.

BORING MACHINE FOR BRUSH BACKS.

APPLICATION FILED FEBQ, 1912.

l ,1 25,35 1 Patented Jan. 19, 1915.

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INVENTOR v ArrbRn/EY (HF Aim-1m: PETERS Cu PH IG-L/THD WASHINGHJN. D c

UNITED'STATES PATENT OFFICE.

WILLIAM G. LIEBIG, 013 DETROIT, MICHIGAN.

BORING-MACHINE FOR BRUSH-BACKS.

Application filed February 9, 1912.

To all whom it may concern Be it known that I, \VILLIAM G. LIEBIG, whoam a citizen of the United States, residing at Detroit, in the county ofWayne and State of Michigan, have invented certain new and usefulImprovements 1n Boring-Machines for Brush-Backs, of which the followingis a specification.

This invention relates to machines for boring holes in wooden blanksused for brush backs, and has for its object an improved device adaptedespecially for use with rounded brush backs used for carpet sweeperbrushes and the like, in which several rows of holes are to be bored inpredetermined order.

In the drawings :Figure 1 is a perspective of the assembled device. Fig.2 is an elevation of the back of the machine. Fig. 3 is an elevationalView of the left end of the machine, as viewed from the front. Fig. 4 isa plan View of the master roller and of the blank whose boring isdesired, at about the level of the line y-y of Fig. 2. Fig. 5 is a sideelevational view of the reciprocating slide carrying the actuating hookwhich engages the master roll, to 1'0- tate it about its axis. Fig. 6 isa plan view of this slide, partly in section.

Projecting from the base 1 of the machine is a bracket 2, which supportsa traveling table 3, from each end of which rise struts 4, through whichengage adjusting and holding screws 5 and 6 for the master roll 7 andthe wooden blank 8 respectively. \Vithin or on one face of one or bothof the struts are rotatably mounted a series of intermeshing gear wheels9, by which rotative movement of the master roll 7 is communicated tothe blank 8. The upper portion of the base is bent over so as tooverhang the table 3 and its supported parts, and init is rotatablyjournaled the spindle ll of the chuck 12, in whose lower end isremovably held the auger 13. Rotative actuation is communicated thereto.by means of the belt 14, (see particularly Fig. 3) which passes overthe pulley 15 on the upper end of the stem 11, and which is preferablyprotected by the shield 16. The belt 14 passes over the pulley 18 whichis keyed to the shaft 19 on which is mounted the pulley 18, to whichactuation is communicated from the engine by means of the belt 17; forthe sake of compactness and efficiency of operation,

the belt 14 is preferably led over the-idler Specification of LettersPatent.

Patented Jan. 19, 1915.

Serial No. 676,657.

pulley 20 between the pulley 15 and the pulley 18*.

The horizontal operating shaft 21, which extends across the rear of themachine at about the level of the table 3, has mounted on it theflywheel 22, over which the belt 17 passes to communicate actuationthereto,

and also the cams or eccentric disks 23 and 24. Of these the cam 23 hason one face the wrist pin 25, over which engages the knuckled end 26 ofthe link 27, which is pivoted to the rear end of the lever 28, by whichthe gimlet carriage or boring member 12 is depressed to effect theboring of holes in the wooden blank. By suitable proportioning of thelength of the lever and of the diameter of thecam and the rotative speedof theactuating power belt, the desired frequency and degree of throw ordescent of the gimlet can be secured. The cam 24 has running over itsperiphery the roller 29 which is journaled in the end of the lever 30,which is pivoted at 31 to the upper part of the frame of the machine, sothat its short arm 32 extends downward in .a nearly verticalposition tothe level of the horizontally reciprocating bar 33, which ispreferably'mounted on the upper end of the pivoted link 34, whose lowerend is pivoted to the bracket 34 which proiects from. the frame or baseof the ma :hine. This short arm 32 being rigid in its angular positionwith respect to the lever 30, and

consequently swinging therewith. moves to and fro as the lever 30 risesand falls, there- .by moving the slide 33 forward and back for thepurpose now to be described.

to the forward end of this bar 35 is the rear end of a hook 38, whosepoint engages over the studs or knobs 40 on the master roll 7, and whichis yieldingly held thereupon by the leaf spring 41 which presses uponits top. The possible tendency of the hook 38 to rise too high as itrotates the master roll in its rearward travel, is counteracted andregulated by means of the stop bracket 47 which depends from thebent-over upper portion of the frame or base, its height being regulatedby the nut $8. This bracket preferably carries on its lower end a roller4-9, which directly engages the hook38. By the rotation of the cam 24:,by which the lever 30 and its connected and coiiperating parts areactuated, the actuation of the master roll 7 through an arc of desiredsize is accomplished at each cycle of operations of the device. This isbrought about through the medium of the hook 38, which is pivoted to thelower forward end of the short arm 32.

Farther along on the shaft 21 from the cam member referred to, that is,toward the right hand end of the machine is supported on the sleeve 45 acam 50, on one face of which is located a'wing 51, and on the other faceof which is located a projecting ratchet 52 which is adapted to beengaged by the hooked lower point of a branch or bracket 53 which isattached to the lever member 30, in such a way that each time the lever32 and with it the branch or bracket 53 swings because of the raising ofthe lever 30, the cam member 50 is rotated through an arc whose size isdetermined by the number of teeth which peripherally constitute theratchet 52; for example, if there are eight teeth in the ratchet, thecam member ,50 is, at each actuation, moved through a 45 degree angle."The number of ratchet teeth in each case corresponds with the number ofrows of pins or studs in the masters roll 7 at any circumferentialpoint, and correspondingly with the number of holes to becomplementarily bored in the wooden blank 8. When, through the repeatedactuation of the master roll 7 rotatively, as already described, theboring of one set of holes has been completed, the cam member 50 has, bythe corresponding repeated pulls upon its ratchet portion 52, been sorotated that its wing piece ,51 engages the head 54 of the pivoted.lever 55, whose forward end carries a spring pressed pawl 56, whichengages in the serrated edge 57 of the rear side of the table 3, pushingit to the right to a degree sufficient tothrow the next row of studs orknobs 40 on the master roll 7 under the hook 38. The boring of the nextcircumferential row of holes is then proceeded with in like manner,.

and at the end of that period the completion of another rotation by cam50 again throws the pivoted lever 55 and moves the table 3 one morenotch in its travel toward the right of the machine. YVhen the last rowor girdle of holes has been bored through the reachingof thecorrespondingly located set of studs 40 by the hook 38, the right handend of the table 3 has been projected so far to the right by therepeated actuations of the lever 55 that the ne vtactuietion n h me eefo ces the gh and end of the table against the bent-over orforwardly-inclined finger 59 of the lever 58, which is pivoted at 60 inposition to swing horizontally when thus engaged by the table end. Thislever when in its normal and unactuated position, as shown in full lineson Fig. 4-, engages with its heel 61 over the top of the rod 62, whichmay be slightly beveled, in such a way as to hold it down against theupward pull of the spring 63; when, however, this lever 58 is thustripped, the pull of the spring-63 shoots the rod 62 upward; this beingconnected with the link 6%, whose upper end is connected with thecontrol lever 65 of the clutch member by which the fly wheel. 22 isoperatively connected with the shaft 21. This stops the further actionof the roller and blank-actuating parts, and forces upon the attentionof the operator the fact that the boring of the-holes in that articularblank has been completed, and that a new blank must be inserted betweenthe holding screws 5, and the table 3 again moved to its initialstarting position at the extreme left of its path of travel, when theclutch 65 being again thrown to operative position, the alternateraising and lowering of the link 27 through the rotation of the cam 23is begun once more, in turn actuating the parts already described. Thereturn of the lever 58 to its interfering position, as regards itsinclined linger 59, across the eX- 'treme end of the path of travel ofthe table 3, is eifeeted by a pull of the operators hand, after thetable has been moved to its starting position at the left side of themachine.

The adjustable support 43 which rises from the forward edge of the table3 engages under the center portion of the blank 8, just clearing itssurface as it rotates, thereby preventingit from bending to any extentor possibly breaking when being pressed upon by the operation of theboring member.

'The arrangement of parts hereinabove described can be used undervaryingconditions and to meet special needs with slight modificationwithout departing from the spirit of my invention; for example thearrangement of actuating belts and pulleys may 'be varied somewhat, orchanged in whole or in part to intermeshing gear wheels, levers and thelike; and for the disclosed mounting of the cam member 50 of therotating shaft 21 which contemplates the employment of a sleeve 45 toavoid to the utmost the influence of the rapidly rotating shaft upon theslowly rotating cam member 50 an independent bracket with suitablebearings, projecting from the suppprting frame may be substituted.

What .I,. a n jis jl a (bor n mac ine, in c mb t n with f ame mem e apower j na'led 'therein, a plurality of power-transmitting membersoperatively connected therewith and with the several parts whose timedactuation is sought, a table member slidably supported in position forlimited travel across said frame member, said table being provided withmeans for rotatably supporting a blank and with a rotatable master rolloperatively connected with said blank-supporting means and adapted to bepositively engaged by one of said powertransmitting members to effectits rotation and consequently the rotation of the blank through an arcof predetermined size, a reciprocatory boring member, means to proiectit into engagement with the blank between successive rotative actuationsthereof, a table-actuating member operated upon at the completion of apredetermined number of rotative movements of the blank, whereby thetable is moved lengthwise to the desired degree, and a stop memberadapted to be tripped by engagement by said table at the limit of itslengthwise travel, and releasing means controlling the further operationof the several power-transmitting members.

2. In a boring machine, in combination with a traveling table providedwith means for rotatably supporting a rounded blank inserted therein, amaster roll operatively connected with said blank-supporting portion ofthe table, means for rotating said master roll and thereby said blankthrough a predetermined are at each operation, a reciprocatory boringmember, means for actuating the same against the blank, means forimparting a lengthwise movement to said table and thereby to said masterroll and said blank after a predetermined number of rotative actuations,and means controlled from a common source of power whereby the severalparts are actuated in desired sequence, substantially as described.

In a boring machine, in combination with a supporting frame member, atable capable of limited horizontal travel with respect thereto, saidtable being provided with means for rotatably supporting a blank andwith means for communicating rotative actuation thereto, a reciprocatorymember for engaging said blank-actuating means on said table to causethe intermittent rotation of the blank, a longitudinally movable boringmember adapted to engage the blank between successive rotativeactnations thereof, a common power shaft with which said reciprocatorymember and said boring member are operatively connected, means renderedactive by the completion of a predetermined number of rotativeactuations of the blank whereby the supporting table and with it theblank are moved in a direction parallel with the axis of the blank, aspringactuated stop member, and a pivoted lever member adapted tonormally hold said stop member in inoperative position and to be swungto releasing position by the engagement thereagainstof said table in oneof its lengthwise movements, thereby permitting the stop member toterminate the further operation of the machine, substantially asdescribed.

at. In a boring machine, the combination of a power shaft, areciprocatory boring men'iber operatively connected therewith, atraveling table adapted to rotatably support a blank in position to beintermittently engaged by said boring member, a reciprocatory memberoperatively connected with said power shaft, adapted to transmitactuation to said blank-supporting portion of the table betweensuccessive operations of said boring member, means rendered active bythe completion of a predetermined number of actuations of said blank,whereby the table and its supported blank are moved lengthwise of theaxis thereof, a pivoted lever member adapted to be swung from its normalposition by the engagement of the table thereagainst upon the completionof its lengthwise path of tr vel. and a spring actuated stop memberadapted to be released by the swing of. said pivoted lever member,whereby the further operation of the machine is terminated,substantially as described.

5. In a boring machine, in combination with a power shaft, a series ofcam members carried thereby, a series of link and le er members, eachderiving its actuation from some one of said cam members, areciprocatorv boring member adapted to be actuated through the medium ofone set of said link and lever members, a traveling table for rotatablysupporting a blank in position to be en aged bv said boring member, theblank being adapted to be rotated through a predetermined are betweeneach forward movement of the boring member by the action of certainother of said link and lever members, and the table and its supportedblank being adapted to be moved lengthwise, after a predetermined numberof rotative actuations of the blank, by the action of still other ofsaid link and lever members, a pivoted lever member adapted to bedisplaced by the engagement of said table thereagainst at the end of itspath of lengthwise travel, and a spring-actuated stop member normallyheld in inactive position by said pivoted lever member and adapted to bereleased by the displacement thereof by said table, thereby terminatingthe further operation of the machine.

6. In combination with a frame member, a reciprocatory boring membersupported therein, a traveling table provided with means for rotatablysupporting a blank and with a master roll operatively connectedtherewith, a reciprocatory master-roll actu ating member whereby it andthereby the blank are rotatively actuated to the degree required betweensuccessive operations of said boring member, a power shaft with whichthe several enumerated parts are operatively connected for action indesired sequence, automatic means for moving said table lengt iwise ofthe aXis of the blank after the completion of a predetermined number ofrotative actuations thereof, a pivoted trip lever adapted to be engagedby said table upon the attainment of the end of its lengthwise path oftravel, and a spring-actuated stop member adapted to be released by thedisplacement of said trip member, thereby terminating the furtheroperation of the machine, substantially as described.

7. In combination with a power shaft, a plurality of power-transmittingmembers operatively connected therewith, a reciprocatory boring memberadapted to be actuated by certain of said power-transmitting members, atraveling table adapted to rotatably support a blank, a reciprocatoryactuating member whereby the intermittent r0- tation of the blankthrough an arc of predetermined size is effected, means brought intoaction by the completion of a predetermined number of rotativeactuations of the blank whereby the supporting table ismoved-lengthwise, a pivoted lever member adapted to be displaced fromits normal position by the engagement of said traveling tablethereagainst upon reaching the end of its path of possible lengthwisetravel, and a stop member yieldingly held in inoperative position bysaid pivoted lever member when the same is in normal position, adapted.to cause the stoppage of the machine when released by the displacementof said pivoted lever member, substantially as described.

8. In a boring machine, in combination with a supporting frame, a boringmember shdably mounted therein, a traveling table carrying a master rolland means for rotatably supporting a blank in operative relaan arc ofpredetermined size, and thereby to said blank from said common powershaft, means actuated by the movement of said master-roll actuatingmeans whereby said table and thereby its supported parts is periodicallyactuated longitudinally of said master-roll and said blank after apredetermined number of rotative operations thereof, and means adaptedto be actuated by the engagement thereagainst of said table when itreaches the end of its intended path oftravel, whereby the furtheroperation of all of said parts is automatically stopped, substantiallyas described.

In testimony whereof I aiiix my signature in presence of two witnesses.

' WILLIAM G. LIEBIG. \Vitnesses WILLIAM M. SWAN, Jnrrnnson G. THURBER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

